Sovon, a Dutch bird protection organisation, counts birds. The number of greylag geese is increasing. Students are asked to investigate whether this increase is worrying for the diversity of water bird species? Students explore what the concept biodiversity means, how it can be described mathematically and what are...

In this activity students consider the questions: Where does rain water go? How can we model the flow of rainwater in real life? What can be done to prevent flooding? When is rain dangerous? Where do floods come from? How can we reduce the damage that flooding causes? Over the last decade some parts of Europe have...